Cook the raw bananas until they are soft, then peel and mash them easily.
Combine the besan, ginger, green chilies, spices, and mashed bananas.
Using your hands, form the banana mixture into small, spherical balls.
In a deep pan, heat enough oil to fry koftas evenly.
The balls should be deep-fried until the outside is crispy and golden brown.
Make the gravy by sautéing the tomatoes, onions, and spices until a smooth curry base is achieved.
Serve hot with rice or naan after adding the fried koftas to the gravy.